Oil gun



Jan, 6. 1925.

c. W. MANZL OIL GUN Filed May 14, 1921 Patented Jan. 5, 1925. A

entran etarras ,c

rattan CHARLES W. MANZED, OF BUFFALO, NEW YORK, ASSIGNOR TO THE BASSICKMANU- FACTURING COMPANY, F CHICAGO, ILLINOIS, A CORPORATION O'FDELAWARE.

OIL

GUN.

To aZZ w11 om t may concern.'

Be 1t known that I, CHARLES W. MANZEL,

a citizen of the United States, residing atl Buffalo, in the county ofErie and State of New York, have invented new 'and useful Improvementsin Oil Guns, of which the following is a specification.

This invention relates to a lubricating gun or pump for forcing oil intothe variousI bearings of automotive vehicles, such as automobiles,although the same may also be used for lubricating other mechanisms.

One object of the invention is to provide an improved. gun ofthischaracter which permits of conveniently delivering the lubricant toremote bearings or bearings usually difficult of access.

Another Objectis to provide an improved means for venting the oilchamber to insure proper working of the gun and at the same time preventleakage of the lubricant from the same. y. In the accompanyingdrawings:v Figure 1 is a longitudinal section of an oil gunV embodyingthe invention. Figuresv 2 and 3 are transverse@ sections on thecorrespondingly numbered lines in .Fig. 1. Figures 4 and 5 areperspective views of theparts for holding the pump plunger in itsnormallretracted position. Figure 6 is a fragmentary v elevation of therear portionv of the gun.

Figure 7. is a fragmentary side elevation of the gun, showing the partsin position for filling the same.

Similar characters of reference vindicate:

corresponding parts throughout the several VIBWS.

The body of the gun is cylindrical and preferably long and slender, asshown, forming an oil supply chamber 10 closed at its ends by screw capsor heads 11, 12.-

Arranged axially in the front portion of the oil chamber and extendingthrough the front cap 11 is a pump -barrel or cylinder -14 of relativelysmall diameter, said cap preferably having an internally-threaded neck15 into which the pump barrel is` screwed. A pair of oil inlet ports 16extending through the wall of the barrel on the inner side of the frontcap, connect the' barrel with the oil supply chamber 10. Sliding inthebarrel is a plunger 17, its rear end passing through `a stuflin0r box ornut 18 threaded on the neck 19 ofP the rear cap 12. Theexternal rearportion-of thisplunger serves as an operating rod and isl provided'witha convenient knob or handle 20 by which the forward stroke ofsaidplungeris effected. Its return stroke is preferably effected by asuitable spring 21 surrounding 60 the plunger-rod and bearing at one'end A against the rear end of the pump barrel 14 and .at its other endagainst -a transverse stop pin 22 secured to said rod. ,This spring iscompressed on the forward `'stroke of the plunger and automaticallyreturns the latter toits vinitial retracted position. The plungeruncovers the inlet ports 16 on reaching the limit of its return orsuction stroke, allowing-fa charge of oil toflowfrom the supply chamberl1() into the barrel, and upon its forward.I stroke, the plunger firstcoversV 'said ports and then expels thecharge from the barrel.

The return Vstroke of the plunger is limited by the pin 22 on theplunger abutting against a spider,23,the arms .24 of which, engage orinterlock with openings 25` in' a tube or sleeve v2 6 fitted within therear end of the chamber 10. This tube is preferably split lengthwise,asy shown at 27, and its rear end: abuts against an inwardly-bent flange28 formed at`the correspondingfe'nd of the oil chamber.l -By thussplitting the tube, assemblage and dismemberment of the parts is greatlyfacilitated. Before placingv the split sleeve into'the supply chamber10, the same' expands lsufficiently to permitv the arms-of the spider23,to, be engaged with'its holes 25. The* s leeve;.,-is`then''compressed4 sufficiently yto enter th'epoil chamber, "Whereby 'thespider is reliably'hinterlockedwith the sleeve. y

In order to vent the ysupply chamber 10 and permit the pump of the 'gunto function 95 properly, the rear portion of the plunger rod 17 isprovided invits surface with'a vent passage 29 preferably in the form ofa comparatively narrow, shallow-groove. f'l'fhe latter extendslengthwise-of said rod and 100 is of the proper length to bridge thepacking in the nut 18 vand adjacent portion of the neck of the cap 1'1and permit air to enter through said vent passage into the oil chamberata predetermined point ofthe re- 105 turn stroke 1lof the plunger. Inthe normal retracted position of the latter, shown by full lines in Fig.1, the front end of the vent passagev is shut off from the supplychamber 10-bythe packing in the nut18V which-seals 119 il this nipple`is a forwardly-projecting guide 1 nozzle or socket 32 'wh-ich isadapted to lit vided with a. curved or concave bottom ex'-vYtendingtothe surface of the plunger-rod,

thevrear end of said chamber,'thereby preventing' leakage of oil throughsaid vent passage. After a charge of oil has been ex-k pelled from lthepump barrel 14e bythe l'forward stroke of the plunger, the latter, on-

being released, automatically returns, and

before the plunger uncovers the ports 16 in' said barrel, the ventpassage 29 is insuch a position as to connect thesupply chamber 10 withthe outer atmosphere,vasA shownby dotted lines in Fig. 1, therebyadmittln-g air thereto. As soonl as the plunger uncovers the ports 16,the. atmospheric pressure in the' supply chamber forces a charge of;oilinto thepump barrel'which is expelled upon the next forward stroke oftheplunger.

By this construction and arrangement, the

pump is automatically vented, requiresno. special adjustments', andthepump 'barrel is normally charged withl oil ready for` use;

The vent-passage 29 lis preferably v,pro-

as shown in Fig. 1, to avoid the formation 'of abrupt ends or edgesliable to catch onthe e packing in the nut 18 and tear or displace it.

The delivery end of the gun may be of any suitable construction, but theprojecting front end of the pump barrel is preferably provided with/ adischarge nipple 30 containing a spring-pressed check valve 8l whicholosestoward said pump barrel to prevent the entrance of dust and theescape` of oil froln the lbarrelivhen the gun is notl in use. Screwed orotherwise secured to overa feed nipple 83 carried by a bearing "or otherpart to be lubricated. This guide nozzle is provided with a packingwasher or gasket 34e of rubber-or other appropriate materiel te ferm e.reliable eil-eight Seel leetween the feed nipple and the guide-nozzle ofthe gun.

To lill the gunlwith a supply of oil, the cap 12 is unscrewed from theoil chamber 10 and the gun held in the position shown in Fig. 6, saidcap being slid to the-rear end of the plunger rod to permit ofconveniently lilling said chamber.

In the use of this oil gun, the pump barf, rel 14, being normallycharged vready for use, as heretofore described, the guide nozzle 32 ispassed over the feed nipple 33 and Ythe plunger pushed forwardly todeliver the charge into the-bearing. ./The pressure thus exerted againstthe plunger handle is transmitted through the oil columnand, the gunbody to the packing gasket 34, Which is thereby lirmly pressed againstJthe end of the feed nipple, producing a. tight and rerliable joint orseal and insuring the delivery of a f full charge of oil into thebearing. Vlhen. the for-ward pressure von the ump plunger is removed,the. same automatically returns to its normal position, during whichmovement a new charge of oil is drawn into thel pump barrel, aspreviously described.

This improved gun is simple in construction, rellablein operationand'being sealed at both ends, can be carried about while filled withoil Without danger of its leaky v"2,v An oil gun, comprising a supplychamber provided 'at lts rear end with an inwardly-bent flange, a pumpbarrel arranged 1n said chamber and provided With an inlet port,aplunger in said barrel control- 'ling said port and extending throughsaid supply chamber, said plunger being provided Withinsaid` chamber inrear of said pump barrel y, with a stop, a return spring applied to theplunger between said stop and the pump barrel, and means for limitingthe return stroke of said plunger, including a sleeve removably arrangedwithin said.

chamber and abutting against said flange, and aspider interlocking withsaid sleeve, said stop normally bearing against said spider.

CHARLES W. MANZEL.

